I'm one of those doing multiple unrelated subjects at once. For me, it's because I have the time. I'm a teacher, and we're out for summer, so I've got time to f

I'm one of those doing multiple unrelated subjects at once. For me, it's because I have the time. I'm a teacher, and we're out for summer, so I've got time to focus on several different things. I can do an hour or so of math a day, alternating the various books I'm going through, and give myself an hour of Irish immersion a day (mostly reading) as I'm already at a comfortable B2+ (officially tested) so it's just a matter of keeping it going. Then I can read some in whatever textbook I'm doing of an evening. My other subjects are much more superficial, happening mostly from reading books while I exercise (walking and biking on a stationary bike are perfect for this). But, really, it's mostly because I have more time and few other hobbies currently (not starting anything new before I move countries in a few months).